Season 1

2005 · 13 episodes · 4h 55m in all · 7.0/10

1. And Then There Were 10
27 Dec 2005 · 23 min · 7.3/10
Average kid, ten year old Ben Tennyson, his Grandpa Max and his cousin Gwen's summer of adventure takes an odd turn when Ben discovers a watch like object that has been jettisoned from alien spacecraft high above the Earth.
2. Washington B.C.
13 Jan 2006 · 23 min · 6.5/10
Ben must fight Dr. Animo, a crazed scientist who has a DNA-altering device.
3. The Krakken
14 Jan 2006 · 23 min · 6.5/10
Ben has his hands full with a giant sea monster and an evil poacher.
4. Permanent Retirement
21 Jan 2006 · 23 min · 6.7/10
Ben must rescue his aunt and grandfather when they are held hostage by shape-shifting aliens.
5. Hunted
28 Jan 2006 · 23 min · 7.2/10
Ben is pursued by three bounty hunters sent by Vilgax to steal the Omnitrix.
6. Tourist Trap
4 Feb 2006 · 22 min · 6.6/10
Ben accidentally releases creatures made of electric energy and must use his own powers to recapture them.
7. Kevin 11
11 Feb 2006 · 22 min · 7.3/10
Ben meets a mutant who can absorb any form of energy and may be after the Omnitrix.
8. The Alliance
18 Feb 2006 · 22 min · 7.2/10
Ben clashes with a female gang member who's become part cyborg.
9. Last Laugh
25 Feb 2006 · 23 min · 6.6/10
Ben discovers an evil circus that's headed by a psychic vampire clown named Zombozo.
10. Lucky Girl
4 Mar 2006 · 23 min · 6.9/10
Ben battles a sorcerer who possesses a number of charms, and Gwen suddenly becomes a superhero when one of the charms falls into her hands.
11. A Small Problem
11 Mar 2006 · 23 min · 7.2/10
Ben gets revenge on an amusement-park attendant who said he was too small to go on a ride.
12. Side Effects
18 Mar 2006 · 22 min · 6.7/10
Ben's summer cold causes strange physical changes in his alien personas.
13. Secrets
25 Mar 2006 · 23 min · 7.9/10
Vilgax tries to get the Omnitrix for himself while Grandpa Max's strange past becomes known, causing a showdown between Vilgax and the Tennyson family.